need link for step by step rooting - already unlocked bootloader

Hi,
I managed to unlock the Bootloader on my Moto G 2nd dual sim. Now I'm looking for a step to step how to to root my phone.
There are so many (confusing) how to's out there
I'm using Marshmallow.
Took me a while to find instructions for non Windows user to unlock bootloader ...so a step by step Linux how to would be appreciated.

thanks in advance,
Best, Martin

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